Feasibility study of patient-specific surgical templates for the fixation of pedicle screws

F. Salako, C. É Aubin, C. Fortin, H. Labelle

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

10 Citations (Scopus)

Abstract

Surgery for scoliosis, as well as other posterior spinal surgeries, frequently uses pedicle screws to fix an instrumentation on the spine. Misplacement of a screw can lead to intra- and post-operative complications. The objective of this study is to design patient-specific surgical templates to guide the drilling operation. From the CT-scan of a vertebra, the optimal drilling direction and limit angles are computed from an inverse projection of the pedicle limits. The first template design uses a surface-to-surface registration method and was constructed in a CAD system by subtracting the vertebra from a rectangular prism and a cylinder with the optimal orientation. This template and the vertebra were built using rapid prototyping. The second design uses a point-to-surface registration method and has 6 adjustable screws to adjust the orientation and length of the drilling support device. A mechanism was designed to hold it in place on the spinal process. A virtual prototype was build with CATIA software. During the operation, the surgeon places either template on patient's vertebra until a perfect match is obtained before drilling. The second design seems better than the first one because it can be reused on different vertebra and is less sensible to registration errors. The next step is to build the second design and make experimental and simulations tests to evaluate the benefits of this template during a scoliosis operation.

Original languageEnglish
Title of host publicationResearch into Spinal Deformities 3
PublisherIOS Press
Pages419-422
Number of pages4
ISBN (Print)1586032666, 9781586032661
DOIs
Publication statusPublished - 2002
Externally publishedYes
Event3rd Biannual Meeting of the International Research Society of Spinal Deformities - Clermont Ferrand, France
Duration: 26 May 200030 May 2000

Publication series

NameStudies in Health Technology and Informatics
Volume88
ISSN (Print)0926-9630
ISSN (Electronic)1879-8365

Conference

Conference3rd Biannual Meeting of the International Research Society of Spinal Deformities
Country/TerritoryFrance
CityClermont Ferrand
Period26/05/0030/05/00

Fingerprint

Dive into the research topics of 'Feasibility study of patient-specific surgical templates for the fixation of pedicle screws'. Together they form a unique fingerprint.

Cite this